In 1860s Britain, a boy inventor finds himself caught in the middle of a deadly conflict over a revolutionary advance in steam power.
| Actor | Role |
|---|---|
 Keiko AizawaRay's Mother (voice) | Ray's Mother (voice) |
 Aiko HibiThomas (voice) | Thomas (voice) |
 Manami KonishiScarlett O'Hara St. Jones (voice) | Scarlett O'Hara St. Jones (voice) |
 Anne SuzukiJames Ray Steam (voice) | James Ray Steam (voice) |
 Sanae KobayashiEmma (voice) | Emma (voice) |
| KKatsuo NakamuraDr. Lloyd Steam (voice) | Dr. Lloyd Steam (voice) |
 Masane TsukayamaDr. Edward 'Eddy' Steam (voice) | Dr. Edward 'Eddy' Steam (voice) |
| SSatoru SatoArchibald Simon (voice) | Archibald Simon (voice) |
 Susumu TerajimaAlfred Smith (voice) | Alfred Smith (voice) |
 Kiyoshi KodamaRobert Stephenson (voice) | Robert Stephenson (voice) |
 Tetsu InadaJason (voice) | Jason (voice) |
 Ikki SawamuraDavid (voice) | David (voice) |
 Osamu SakaThe Admiral (voice) | The Admiral (voice) |